JP2965756B2 - Drilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling device for drilling a hole in a workpiece, which is provided with a jig having a hole for guiding a tool at a position of a hole to be drilled.

[0002]

2. Description of the Related Art As shown in FIG. 5, for example, a portion of a turbine rotor 100 to which a moving blade 110 is fixed has a comb shape, which is a narrow portion where it is difficult to insert a processing machine. . Here, in order to fix the moving blade 110, it is necessary to provide a plurality of pin holes parallel to the axial direction of the turbine rotor 100. Since this pin hole is provided in a continuous form at the portion corresponding to each tooth of the comb tooth, the hole depth of each tooth is not so large, but when considering the entire comb tooth, it is substantially a deep hole. Become. Therefore, it is not possible because of the space for the setup and the accuracy of the holes. In other words, the drill length is inevitably increased in order to cope with deep hole drilling, so when using only a general drilling machine, the rotating drill will run out and the drill tip will bend during drilling. In addition, it is impossible to make a hole at an accurate position. In particular, when the price of one product is high, such as the turbine rotor 100, deviation of the drilling position must be avoided. For this reason, at the time of such drilling, it is conceivable to use a jig in which holes have been drilled in advance at positions corresponding to the drilling positions of the workpiece.

Conventionally, in such a case, for example, a jig 120 having a fan-shaped segment as shown in FIG. 10 is attached to the moving blade fixing portion 101 of the turbine rotor 100, and a pin hole is formed by a special drilling device. doing. The drilling device comprises a drill provided to oppose each other and a
A moving mechanism is provided for moving the drill in the direction, the Y direction, and the Z direction. After manually guiding the drill to the jig hole, the drill is moved along the jig hole to form a pin hole.

[0004]

However, such a conventional drilling device has a problem that it takes a great deal of trouble since the drill must be manually guided to the jig hole position accurately. In particular, when a large number of pin holes need to be formed as in the case of the turbine rotor 100, the labor becomes very large.

In order to guide the drill to the jig hole, it is easy to use an NC device in which the position of the jig hole is stored in advance. However, even if the data regarding the jig hole input to the NC device is correct, as shown in FIG.
It is conceivable that the drill cannot be accurately guided to the jig hole due to the bending error and positioning error of the drilling machine itself. A similar phenomenon occurs when data relating to the jig hole is erroneously input.

The present invention has been made in view of such a conventional problem. When a jig is attached to a workpiece and drilling is performed, a hole is formed at an accurate position without trouble. It is an object to provide a drilling device capable of drilling.

[0007]

According to the present invention, there is provided a drilling apparatus for achieving the above object, wherein three or more holes to be drilled are provided.
Also, three or more holes are formed to guide the tool to the
Use a jig to drill three or more holes in the workpiece.
In joining apparatus, the relative position of all holes of 3 or more of said jig
Storage means for storing the position ,
At least two of the three or more holes in the jig
And contacts for measuring the center position of the hole, the workpiece
Insert all the holes of the jig attached to the object.
And a probe for searching whether or not each hole exists
And the tool, the contact, and the probe are exchanged with each other.
By doing so, they can be mounted at the same position and
Of the tool, the contact, and the probe attached
Moving means for moving one to the hole position, and the storage means
Operate the moving means according to the stored hole position
Control means, and a hole position stored in the storage means.
Comprising conversion means for converting the other position, and the workpiece
Of the three or more holes in the jig attached to
At least two holes are attached to the moving means
The two contacts are guided manually by the
The center position of the hole is measured, and the converting means
At least two holes in the jig obtained by measurement with a child
Based on the position of the
The relative positions of all holes in the tool are
Coordinate conversion to the position on the jig
All the hole position of the jig is stored in the storage means, said system
The control means is the processing target stored in the storage means.
At the hole positions of all the jigs attached to the object,
The probe is guided by moving means, and when the probe is guided,
If there is a hole through which the probe cannot be inserted, store it in the storage unit.
The probe is not inserted
And the hole position, leads to the contact probe in the mobile unit, the contact
To to determine the exact center position of the hole, said conversion means
Is stored in the work piece stored in the storage means.
Of all the hole positions of the jig
What was measured by the contact was measured with the contact.
Into the hole position, and store the hole position in the storage means.
And the control means is stored in the storage means.
The final jig converted by the conversion means
Japanese into the hole position of the leads to the tool by the moving means, that
It is a sign.

[0008] Here, in the drilling device, the Symbol
The storage means includes all the holes in each jig
The relative position is stored in advance and is attached to the workpiece.
At least three or more holes of the jig being drilled
The two holes are provided with the contact attached to the moving means.
When the stylus is guided manually, the two holes
The center position is measured, and the converting means is provided by the contact.
Based on the position of at least two holes obtained in the measurement,
Determine the type of the jig attached to the workpiece
And various jigs stored in the storage means.
Of which, relative to all holes of the jig of the type specified by discrimination
The position on the jig attached to the workpiece
It may be characterized by performing coordinate conversion to the location
No.

In the above-described drilling apparatus, a load detecting means for detecting a load applied to the tool when the workpiece is drilled, and a load detected by the load detecting means are predetermined. Warning means for issuing a warning when the load exceeds the given load may be provided. Further, position detecting means for detecting the position of the tool when drilling a hole in the workpiece, cutting abnormality storage means for storing a situation at the time of cutting abnormality, and the load applied to the tool is The cutting to determine the cause of the cutting abnormality by comparing the load and the position of the tool when the load exceeds a predetermined load with the situation at the time of the past cutting abnormality stored in the cutting abnormality storage means. Abnormality determining means, display means for displaying the cause of the determined cutting abnormality, and instructing means for instructing the moving means of the tool to the moving means according to the determined cause of the cutting abnormality may be provided. .

[0010]

The drilling of a narrow part is limited to the space, but it is possible to create the shape of the processing machine in a possible space. However, in processing a deep hole in a narrow part, as described above, a jig is indispensable for performing an accurate drilling operation.

Therefore, before starting the processing, first, a jig is attached to the workpiece. Next, the hole position of the jig attached to the workpiece is measured by moving the contact . The tool for drilling a hole in the workpiece is guided to the jig hole position obtained by the measurement by the moving means, and cutting is started. As described above, since the tool is automatically guided to the jig hole position, it is possible to save the trouble of manually performing this. In particular, when a plurality of holes are drilled, the effect is great.

When drilling holes using a jig, it is important to accurately guide the tool tip to the jig hole. Therefore, in the case of having the storage means, first,
A contact as a measuring terminal is attached to the moving means, and the contact is manually guided to some of the plurality of jig holes to measure the center positions of some of the jig holes. Based on the data obtained by this measurement, the conversion means determines the type of the jig attached to the workpiece, and the jig actually mounts the determined jig hole stored in the storage means. Is converted to correspond to the specified position.

Next, a probe is attached to the moving means in place of the contact, and the probe is guided to all the converted jig hole positions by the moving means. Have them measure or not. Generally, a device has a bending error due to the rigidity of the device itself, a tool movement error, and the like. Further, the jig hole position may be erroneously input at the stage of inputting the jig hole position into the storage means. In such a case, if the tool is directly guided to the jig hole position (the converted jig hole position) stored in the storage means, the tool and the jig will be damaged. In addition, it is not possible to make a hole at an accurate position. Therefore, the probe is attached to the same position where the tool of the moving means is attached, and the exact positions of all the jig holes are actually confirmed. If there is no jig hole at the jig hole position (the converted jig hole position) stored in the storage means, the contact is again attached to the moving means instead of the probe, and the jig hole is replaced. To measure the exact center position of Then, the conversion means further converts the converted jig hole position stored in the storage means to the measured position.

The tool is guided by the moving means to the jig hole position finally stored in the storage means, and a hole is formed in the workpiece.

As described above, since the probe and the contact are attached to the position where the tool is attached and all the positions of the jig holes are actually measured, the bending error due to the rigidity of the device itself,
It is possible to prevent a movement error of the tool, an error in inputting the position of the jig hole into the storage means, and the like, and the tool can be accurately guided to the jig hole.

In the case where two tools are arranged so as to face each other, the tool length can be reduced with respect to the hole depth, so that the runout of the tool can be reduced and
Since drilling can be performed from both sides of the workpiece,
Processing time can be reduced by almost half.

[0017]

An embodiment of the present invention will be described below with reference to the drawings.

First, referring to FIGS. 5 and 6, a description will be given of a turbine rotor 100 to be processed in this embodiment. Rotor blade fixing portion 101 of turbine rotor 100
Has a comb shape. Here, moving blade 11
In order to fix 0, it is necessary to provide a pin hole 102 parallel to the axial direction of the turbine rotor 100 for each of the teeth 101a, 101b,. This pin hole 102 is a hole to be machined in this embodiment.

Next, a jig used for performing a drilling process will be described with reference to FIGS. As shown in FIG. 6, the jig 120 has the same cross-section and a comb wave shape so as to correspond to the shape of the comb-shaped moving blade fixing portion 101, and the front shape is shown in FIG. As shown, it has a fan-shaped segment shape. Fan-shaped jig 1
The holders 105 and 106 for attaching the jig 120 to the turbine rotor 100 are provided in the vicinity of the key portion 20. A jig hole 122 is formed in the jig 120 at a position corresponding to the pin hole 102 of the turbine rotor 100. A guide bush 123 inscribed in the jig hole 122 and having the same inner diameter as the diameter of the pin hole 102 is mounted in the jig hole 122.

Next, the structure of the automatic drilling device will be described. FIG. 1 is a front view of the automatic drilling apparatus, and FIG. 2 is a view taken along line II in FIG. FIG. 3 is a sectional view taken along the line III-III in FIG.
It is a line sectional view. Reference numeral 1 denotes a column, and an upper plate 1a is provided at an upper portion thereof, and a lower plate 1b is provided at a lower portion thereof. A pair of bearings 2, 2, 4, and 4 are provided on the lower surface of the lower plate 1b.
The bearings 2 and 4 are fixed to the base 6
Pair of rails 7, 8 fixed to the upper surface of
Is slidably fitted in Reference numeral 9 denotes an NC device fixed to the upper surface of the lower plate 1b. Reference numeral 10 denotes an X-direction moving motor fixed to the base 6. A shaft 10a of the X-direction moving motor 10 is connected to a screw 12 disposed in parallel with the X direction via a joint 11. Are linked. A nut 13 is fitted on the screw 12, and the nut 13 is fixed to a lower surface of the lower plate 1b by a bolt 14. 16 is screw-12
Are rotatably supported, and the bearing 16 is supported by the support 15. Therefore, the column 1 can be moved in the X direction through the screw 12 and the nut 13 by the rotation of the X direction moving motor 10.

On the side surface of the column 1, a laser is provided in parallel with the Y direction.
, And bearings 18, 19, which are fixed to the saddle 17, have rails 22, 2, respectively.
3 is slidably fitted. A motor 24 for Y-direction movement is fixed on the upper plate 1a, and a shaft 24a of the motor 24 for Y-direction movement is connected via a joint 25 to a screw 26 arranged in parallel in the Y direction. Have been. The screw 26 has a lower end rotatably fixed to a holder 27 on the lower plate 1b. A nut 28 is fitted on the screw 26.
This nut 28 is fixed to the saddle 17. Therefore, the saddle 17 can move in the Y direction via the screw 26 and the nut 28 by the rotation of the motor 24 for moving in the Y direction.

As shown in FIG. 3, screws 29, 3 are provided on the saddle 17 so as to be parallel to the Z direction and to face each other.
0 is rotatably fixed via bearings 31 and 32. The screws 29, 30 are connected to Z-direction moving motors 41, 42 via joints 39, 40, respectively. Nuts 43 and 44 are fitted to the screws 29 and 30, respectively.
Head 7, in which 3, 44 are arranged to oppose each other
4,75. Two pairs of rails 45, 45, 47, 47 are fixed to the saddle 17 so as to oppose each other, and bearings 49,. , ..., head 45,
46. Accordingly, the rotation of the Z-direction moving motors 41 and 42 causes the heads 45 and 46 to rotate.
Can move in the Z direction.

On the other hand, drill driving motors 57, 58 are fixed to the opposed heads 45, 46, respectively, and joints 59, 60, shafts 61, 62,
Gears 63, 64, 65, 66 and 66a, 67, 6
8, 69, it is possible to transmit the rotation of the drill driving motors 57, 58. Collets 70 and 71 are incorporated in the gears 66 and 69, and drills 72 and 73 can be attached and detached, respectively. Here, the rotation of the drill driving motors 57, 58 causes the drills 72, 73 to rotate. The bearings 31 and 32 applied to the end faces of the screws 29 and 30 arranged in parallel with the Z direction are provided with thrust force detection sensors 83 and 84 for detecting the thrust force applied to the drills 72 and 73. .

The collets 70 and 71 have drills 72 and 7
Instead of 3, the contacts 81, 81 for detecting the position of the jig hole as shown in FIG. 8 and whether or not the jig hole 122 as shown in FIG. 15 is at the target position are detected. The probes 82 and 82 are respectively attached. As shown in FIG. 16, a ring 88 having conductivity is attached to the collets 70 and 71, and by electrically connecting a turbine rotor 100, which is a workpiece, to a drilling machine. Contact 81 is jig hole 1
When the contact is made, the contact 81, the collet 71, the ring 88, the drilling machine, the turbine rotor 100, and the jig 120 form a circuit in which a current flows. This current is supplied to the ring 88 by the NC device 9.
, Can be detected.

As shown in FIG. 4, the NC unit 9 supplies a pulse signal to each of the motors 10, 24, 41,... Which are driving units of the drilling machine, and controls a driving amount of these motors. A position detector 97 for detecting the positions of the drills 72, 73, the contacts 81, 81 or the probes 82, 82 from the pulse signals output to the motors 10, 24, 41.
a, 97b, 97c and position detectors 97a, 97b, 9
7c, ring 88 and thrust force detection sensors 83, 8
An arithmetic unit 91 for giving an instruction to the control unit 98 based on the signal from the control unit 4, a CRT 96, and a buzzer 99 are provided. The arithmetic unit 91 has a memory 9 in which various programs for operating the drilling machine are stored.
3 and a CP that actually performs an operation based on this program
A U92, an interface circuit 94, and a CRT controller 96 are provided. In the memory 93, in addition to the various programs, a jig hole position for each jig of each size is stored.

The moving means is a motor 1 for X-direction movement.
0, Y direction movement motor 24, Z direction movement motor 4
In addition to the drive sources 1 and 42 and the mechanism for moving the drills 72 and 73, a memory 93 in which a program for operating these is stored, and operation instructions are given to the drive sources and the like based on the program. It comprises an arithmetic unit 92 having a CPU 92. The conversion means is a memory 93 storing a conversion program.
And a CPU 92 for performing an operation for conversion based on the
It is composed of

Next, the operation of the drilling apparatus according to the embodiment will be described with reference to the flowchart shown in FIG. First, in step 1, as shown in FIG. 6, the jig 120 is set on the bucket fixed part 101 of the turbine rotor 100.
Here, the jig 120 is fixed to the comb-shaped moving blade fixing portion 101.
And screw 10 into holders 105 and 106.
7 and 107 are screwed together to fix the jig 120.

In step 2, the contact 8 is attached to the collet 71.
1 and jig holes 122, 122
The center position of the two points is measured. FIG. 9 shows a state where the contact needle 81 is set on the collet 71 of the head 75. As shown in FIG. 11, the jig holes 122, 122 to be measured have a diagonal relationship between the plurality of jig holes 122, 122,. The center points P ₁₁ and P _{mn of the} hole are two points. First, as shown in FIG. 12, the X-direction movement motor 10, the Y-direction movement motor 24 and the Z-direction movement motor 41 are driven, and the contact 81 is guided into the jig hole 122 by manual operation. Then, as shown in FIG.
.., 123d on the inner wall 3
And the four positions are measured, and the arithmetic unit 91 of the NC device 9 calculates the center coordinate position P ₁₁ (X ₁₁ , Y ₁₁ ) of the jig hole 122 from the values. Similarly, for the other jig hole 122, the center coordinate position P
_mn (X _mn , Y _mn ) is calculated. .., 123d on the inner wall of the guide bush 123
When 1 contacts these locations, a current flows from the ring 88 to the NC device 9 and is obtained from the data from the position detectors 95, 96, and 97 when the current is input.

In step 3, a registration jig is selected.
This is because the data regarding the jig hole position for each jig of each size registered in advance in the memory 93 of the NC device 9 is as follows.
Referring to the distance between two points P ₁₁ (X ₁₁ , Y ₁₁ ) and P _mn (X _mn , Y _mn ) acquired by the measurement, the jig 120 to be used among the registered jigs is used. Select which jig is the jig. Note that P ₁₁ (X ₁₁ ,
At this time, the NC device 9 also recognizes the position of the jig 120 with respect to the drilling machine based on Y ₁₁ ) and P _mn (X _mn , Y _mn ).

In step 4, the NC data for the selected jig 120 is shifted. The jig 120 is shown in FIG.
As shown in FIG. 0, since the jig 120 is used while being moved with respect to the turbine rotor 100, the registered data actually exists based on the position of the jig 120 recognized in step 3. To the position where it is.

In step 5, the probe 82 is attached to the collet 71, and the position of all the jig holes 122, 122,.
This is because, when actually operated based on the jig hole position data in the NC device 9, the drill 72 is not necessarily moved to the commanded position due to the bending error and the positioning error caused by the rigidity of the machine. This is because 73 cannot be moved accurately. For this reason, the probe 82 is attached to the same position as the position where the drill 72 is provided, and the probe 82 is moved based on the converted NC data so that all the jig holes 12 are removed.
2, 122,... Position is checked. Probe 82
Has a tip portion smaller by 2 × Δl than the inner diameter Db of the guide bush 123, as shown in FIG. 15, and determines whether or not this tip portion passes through the inside of the guide bush 123. When the probe 82 has passed through all the jig holes 122, 122,..., The process proceeds to step 6, and when the probe 82 has not passed through some or all of the jig holes 122, 122,. Goes to step 7. Whether or not there is no passage is determined by the ring 8 attached to the collet 71.
Judgment is made based on whether or not a current has flowed from step 8. That is, since the diameter Da of the tip of the probe 82 is smaller than the inner diameter Db of the guide bush 123 by the allowable value 2 × Δl as described above, the jig is used only when the tip of the probe 82 does not pass. As a result, current flows through the ring 88.

In step 7, the contact 81 is attached to the collet 71 again, and the position of the defective hole is measured.
Here, the center coordinates of the jig hole 122 are read in the same procedure as in step 2 for the non-passing jig hole 122. Then, in step 8, the read center coordinates are exchanged with the data converted in step 4. When the replacement is completed, the process returns to step 5 again, and the position of the corresponding hole is checked. In the case where no passage occurs in step 5, all the holes are checked by the probe 82 in order to save the trouble of attaching the contact 81 to the head 75 and the trouble of attaching to the probe 82 each time. At the time of completion of the check, only the non-passing holes are re-measured and the procedure for proceeding with the check is performed.

Here, regarding the conversion of NC data, FIG.
7 will be described in detail. The data is roughly classified into three types: NC original data, data after coordinate conversion, and data corrected based on the hole position of the jig. These data include:
All the other data center coordinates P ₁₁ of jig hole 122, there is a symbol for determining that OK / NG, when checking a jig hole in step 5, it is determined whether OK or NG, the result Used to capture. At the stage where all the jig holes have been checked, if all of the symbol portions are OK, the process proceeds to processing (step 6). If there is even one NG, the jig hole position is re-measured (step 7).
Will go to.

The NC original data is hole data registered in advance for each type of jig 100. According to the number of the jig holes 122 of the jig 100, respective center coordinates P ₁₁ ,
.., P _mn are registered.

The data after the coordinate conversion is based on the measured data of the two points of the jig hole 122 in step 2 and the registered data is transferred to the position where the jig 120 actually exists. This is the converted data. Specifically, the X coordinate and the Y coordinate are respectively moved by Δx and Δy for each hole in accordance with the inclination of the jig 120. For example, P ₁₁ = (O
K / NG, x ₁₁ , y ₁₁ ) is P ₁₁ ′ = (OK / NG, x
₁₁ + Δx, y ₁₁ + Δy) = (OK / NG, x ₁₁ ′,
y ₁₁ ′).

The data corrected at the hole position of the jig is re-measured in step 5 for the hole having a position error, and the data after coordinate conversion are further subjected to Δxa, Δ
ya min corrected de - in data, for example, when the center coordinates in step 5 is a jig hole 122 of the P ₁₁ is defective position,
P ₁₁ ′ = (NG, x ₁₁ ′, y ₁₁ ′) becomes P ₁₁ ″ = (N
G, x ₁₁ ′ + Δxa, y ₁₁ ′ + Δya) = (NG,
x ₁₁ ″, y ₁₁ ″).

As described above in detail, the most effective points of this embodiment are as follows.

The first point is that the use of the jig 120 enables accurate drilling work. Especially,
In the case of machining a deep hole, the tool becomes long, and even if the hole position can be set accurately, an error due to run-out occurs, and the machined hole position becomes inaccurate.
Due to the characteristics of the material No. 00, a phenomenon appears in which the direction is bent during the processing. However, in this embodiment, the jig 12
By using 0, the guiding of the tools of the drills 72 and 73 is ensured, and the bending of the drills 72 and 73 can be prevented, so that accurate drilling is possible.

The second point is that the position of the jig 120 is recognized by first measuring the positions of the holes of the jig 120 attached to the turbine rotor 100 at two locations, and the NC registered beforehand is registered. Since the data is converted to the position where the jig 120 actually exists, the drills 72 and 73 can be automatically guided to the jig hole 122 thereafter.

The third point is that the probe 82 is mounted at the same position where the drill 72 is provided,
Are moved based on the converted NC data, and the positions of all the jig holes 122, 122,... Are checked, and the converted NC data is further corrected according to the check result. An object of the present invention is to eliminate the error factors of the device and the drilling machine.

In this embodiment, efficient work is performed in consideration of the following points.

The first is an abnormality processing when an abnormality occurs during cutting.

In normal cutting, it is sufficient to proceed the processing step without any particular problem. However, it is sufficiently considered that cutting chips may be caught during cutting or the drills 72 and 73 may be damaged.
If the processing method in this case is not considered, it is necessary to constantly monitor the cutting state, which is extremely inefficient.

Therefore, in the saddle 17, thrust force detection sensors 83 and 84 for detecting the thrust force applied to the drills 72 and 73 during cutting are provided. Further, in the memory 93 of the NC device 9, two types of thrust force (level 1 <level 2) serving as a reference for judging a cutting abnormality are set in advance. CP
U92 will compare and determine the cutting state. In determining the cutting state, basically, tool breakage, chip clogging,
The three forms of tool wear are determined.

This processing will be sequentially described with reference to the flowchart shown in FIG.

If a thrust force exceeding level 1 is detected during cutting, an interrupt is immediately issued (step 11), and an alarm is issued from the buzzer 99 (step 12). At this time, the detected thrust force is level 2
It is also judged whether it is less than or less than level 2,
If it is lower than level 2, the process proceeds to step 13, and if it is higher than level 2, "tool breakage" is immediately displayed on the CRT 96 (step 20). Since the thrust force at that time differs between the tool breakage and the other abnormal cutting state, it is determined whether the tool breakage is based on the detected thrust force.

If it is determined that the level is less than level 2 and the process proceeds to step 13, the current coordinate values in the X and Y directions of the drills 72 and 73 are read from the position detectors 97a and 97b, and the last time an alarm is issued The coordinate values of the drills 72 and 73 in the X and Y directions are compared with the read coordinate values, and the distance C between them is calculated (step 14). In step 15, a magnitude relationship between the mutual distance C and a predetermined distance ε is determined. Here, as the predetermined distance ε, as an example, the adjacent jig holes 122, 1
Twenty-two distances C are determined. If the mutual distance C is larger than the predetermined distance ε, it is determined that the chip is merely a swarf, and the process proceeds to step 16 to display “Chip swarf” on the CRT 96. The distance C
Is less than or equal to the predetermined distance ε, it is determined that the tool is worn, and the process proceeds to step 21 in which “tool wear” is changed to C.
Display on RT96. In general, when a tool is worn, chips are generated and the same thrust force is generated as in the case of simple chips.However, when the tool is worn, the chips are removed and the next pin hole is removed. When cutting is started, there is a very high possibility that chip jams will occur again. That is, if swarf clogging frequently occurs, it can be determined that the swarf clogging is due to tool wear. Therefore, if the distance between the positions of the drills 72 and 73 at the time of the previous alarm generation and the current positions of the drills 72 and 73 is short, and the frequency of chipping is increased, it is determined that the tool is worn.

After the "tool wear" display (step 21) and the "tool breakage" display (step 20), the drill 7
After the drills 72, 73 are returned to the start position in order to replace them 2, 73, the rotation of the spindle is stopped (step 23). The apparatus enters a standby state (step 24), during which the drills 72 and 73 are replaced. On the other hand, after the display "Clogged chips" is displayed (Step 16), the drills 72 and 73 are returned to the start positions and stopped (Step 17). During this time, chips are discharged (step 18). Thereafter, the drills 72 and 73 are returned to the alarm generating position, and the processing is started again therefrom (step 19).

As described above, by automatically coping with a cutting abnormality, work efficiency is improved.

The second point in consideration of efficient work is that the drills 72 and 73 for processing a deep hole are opposed to each other.

In the case of a deep hole, a long drill is naturally required. However, the run-out during rotation increases in proportion to the length of the protrusion of the drill, and it becomes difficult to insert the jig into the hole, or the drill may be damaged. It can be the cause. Further, when processing the rotor blade fixing portion 101 of the turbine rotor 100, it is easily considered that the space is narrow and interference occurs, so that the processing becomes impossible. Therefore, as shown in FIGS. 3 and 19,
By opposing the drills 72 and 73 to each other, the length of the drill can be shortened, run-out during rotation can be prevented, and deep hole drilling in a narrow portion can be performed. The procedure for moving the drills 72 and 73 opposing each other is to start drilling from both sides, and then to retract one of the drills 72 and contact the other drill 73 before the two drills 72 and 73 come into contact. To move forward. Then, both drills are retracted where the holes have penetrated.

[0052]

According to the present invention, the hole position of the jig is actually measured, and the tool is guided to that position.
The trouble of guiding the tool to the jig hole can be omitted, and the tool can be guided to an accurate position.

In particular, in the case where the tool and the measuring terminal can be mounted at the same position, the rigidity of the device itself can be absorbed, and the error in the movement can be absorbed. There is no need to adjust the tip,
The labor can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is an overall front view of a drilling device according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of the arrow II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a circuit block diagram of an NC device according to an embodiment of the present invention.

FIG. 5 is a side view of the turbine rotor.

FIG. 6 is a sectional view of a jig according to an embodiment of the present invention.

FIG. 7 is a flowchart showing an operation of the drilling device of one embodiment according to the present invention.

FIG. 8 is an overall side view of a contact according to an embodiment of the present invention.

FIG. 9 is a top view of the head when the contact according to one embodiment of the present invention is attached.

FIG. 10 is an explanatory diagram for explaining a mounting position of a jig of one embodiment according to the present invention.

FIG. 11 is an explanatory diagram for explaining a hole position of a jig of one embodiment according to the present invention.

FIG. 12 is an explanatory diagram for explaining movement of a contact according to one embodiment of the present invention.

FIG. 13 is an explanatory diagram for explaining calculation of the center position of the jig hole by the contact according to the embodiment of the present invention.

FIG. 14 is an explanatory diagram showing possible error factors when an NC device is used.

FIG. 15 is an overall side view of a probe according to an embodiment of the present invention.

FIG. 16 is an explanatory diagram showing an electric signal path for detecting that the contactor has contacted the jig hole according to one embodiment of the present invention.

FIG. 17 is an explanatory diagram showing conversion contents of NC data according to one embodiment of the present invention.

FIG. 18 is a flowchart in the case where there is a cutting abnormality in the drilling device of one embodiment according to the present invention.

FIG. 19 is an explanatory diagram showing a procedure for cutting with an opposing drill according to one embodiment of the present invention.

[Explanation of symbols]

9 NC device, 10 X direction movement motor, 24 Y direction movement motor, 41, 42 Z direction movement motor, 7
0, 71 ... collet, 72, 73 ... drill, 81 ... contact, 82 ... probe, 83, 84 ... thrust force detection sensor, 91 ... arithmetic unit, 92 ... CPU, 93 ... memory, 97a, 97b, 97c ... position Detector 99 Buzzer 100 Turbine rotor 101 Moving blade fixed part 1
02: pin hole, 120: jig, 122: jig hole.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Kuwahara 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Hitachi Plant (72) Inventor Kenji Sudo 3-1-1, Sachimachi, Hitachi-shi, Ibaraki No. 1 Hitachi, Ltd., Hitachi Works (72) Inventor Akihiko Harima 3-1-1, Sakaimachi, Hitachi, Ibaraki Prefecture Hitachi, Ltd., Hitachi Works (72) Inventor Yasuhiro Kadowaki, Yachimachi, Hitachi, Ibaraki No. 1-1, Hitachi, Ltd. Hitachi Plant (56) References JP-A-60-85808 (JP, A) JP-A-61-159311 (JP, A) JP-A-61-136704 (JP, A) JP-A-1-10909 (JP, A) JP-A-63-21506 (JP, U) JP-A-63-10009 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23B 39/08 B23B 49/00

Claims (4)

(57) [Claims] At least three holes where drilling is planned
Three or more holes are also formed to guide the tool
Drilling equipment for drilling 3 or more holes in a workpiece using a jig
In location, the relative positions of all the holes of 3 or more the jig is not stored
Storage means, and three or more holes of the jig attached to the workpiece.
To measure the center position of at least two holes
Insert the contact and all the holes of the jig attached to the workpiece
To search for the existence of each hole by letting it pass
, The tool, the contact, and the probe are exchanged with each other.
By doing so, they can be installed at the same position and
One of the tool, the contact, and the probe being mounted
Moving means for moving the hole to the hole position, and moving the hole in accordance with the hole position stored in the storage means.
Control means for operating the means, and converting the hole position stored in the storage means to another position
Comprising converting means for, the, the jig 3 or more of the attached to the workpiece
At least two of the holes should be fitted to the moving means.
That the attached contact is guided manually.
Thus, the center position of the two holes is measured, and the conversion unit performs the measurement using the contact.
The memory device based on the position of at least two holes in the jig;
The relative positions of all the holes of the jig stored in the column are
Coordinates on a position on the jig attached to the workpiece
After conversion, all the hole positions of the jig subjected to the coordinate conversion are described above.
Storage means, wherein the control means stores the
Hole positions of all the jigs attached to the workpiece
Guiding the probe by the moving means, and guiding the probe.
When there is a hole through which the probe cannot be inserted,
A hole position that is stored in the stage, 該探probe is inserted is
Guide the contact by the moving means to the hole position that was not
Causing the contact to measure the exact center position of the hole, wherein the converting means is stored in the storage means,
All hole positions of the jig attached to the workpiece
Of those, the one to be measured by the contact
The position is further converted to the hole position measured with the stylus, and the hole position is recorded as described above.
Storage means, wherein the control means stores the
Final positions of all holes of the jig converted by the conversion means
Wherein the tool is guided by the moving means . 2. A drilling apparatus according to claim 1, wherein said storage means stores all holes of each jig for each jig.
Mutual relative position is stored in advance, 3 or more of said jig said attached to the workpiece
The center position of the two holes is measured by manually guiding the contact attached to the moving unit to at least two of the holes, and the conversion unit uses the contact. The small amount obtained by measurement
Attach to the workpiece based on the positions of at least two holes
With determining the type of said jig being kicked, among various jig stored in the storage means, especially the discrimination
The relative positions of all holes of the specified type of jig are
Wherein the coordinates are converted to a position on the jig attached to the hole. 3. A hole according to claim 1, wherein
In a drilling device, a load detecting unit that detects a load applied to the tool when drilling a hole in the workpiece, and a warning is issued when a load detected by the load detecting unit exceeds a predetermined load. drilling device you characterized in that it and a warning means for emitting. 4. A drilling device according to claim 3, wherein a position detecting means for detecting a position of said tool when drilling said workpiece, and a situation in case of abnormal cutting are stored. Cutting abnormality storage means, a load when the load on the tool detected by the load detection means exceeds the predetermined load and the position of the tool, and are stored in the cutting abnormality storage means. Compared with the situation at the time of the past cutting abnormality, cutting abnormality determining means for determining the cause of the cutting abnormality, and display means for displaying the determined cause of the cutting abnormality , the control means, Depending on the cause of the abnormal cutting
Instructing movement position of the tool to the moving means, the drilling apparatus characterized and this.